Application of 3-methyl-1-phenyl-2-pyrazoline-4, s-dione as a novel reagent for development of latent fingerprints on paper

3-methyl- 1-phenyl- 2-pyrazoline- 4,5-dione is a new substance which has been prepared in the laboratory for detection of amino-acids. In this work, this substance of developing latent fingerprints on paper was used. It was compared with a well-known developer "ninhydrin" and was found to be the same as regard to sensitivity, clarity and contrast, whether the latent fingerprints were new or old, but the new substance is superior with regard to its preparation as it is easily prepared in the laboratory from available cheap substances i.e. it is economically better than ninhydrin